Sigma Disc. 70-300mm F/4-5.6 LD 1:2 Auto Focus Macro Zoom Lens with Hood for Pentax AF - USA with 6 Year USA Warranty

This is the definitive lightweight, compact telephoto macro zoom with a maximum magnification ratio of 1:2 at the 300mm setting -- ideal for shooting subjects that are difficult to approach such as sporting and theatrical events. The lens also features special effects such as the capability to provide beautifully blurred backgrounds to highlight the main subject in protraiture, or "compression effects" that make the most of the telephoto lens. By switching to maco mode, subjects as close as 0.95m can be shot within the focal range of 180-300mm, for true macro photography. The optical system incorporates a LD (Low Dispersion) lens, resulting in clear sharp images free of chromatic aberration.